4001432261 has 2 divisors, whose sum is σ = 4001432262. Its totient is φ = 4001432260.

The previous prime is 4001432233. The next prime is 4001432299. The reversal of 4001432261 is 1622341004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2196796900 + 1804635361 = 46870^2 + 42481^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4001432261 is a prime.

It is a super-2 number, since 2×4001432261² = 32022920278743144242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4001432161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2000716130 + 2000716131.

It is an arithmetic number, because the mean of its divisors is an integer number (2000716131).

Almost surely, 2^4001432261 is an apocalyptic number.

It is an amenable number.

4001432261 is a deficient number, since it is larger than the sum of its proper divisors (1).

4001432261 is an equidigital number, since it uses as much as digits as its factorization.

4001432261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 4001432261 is about 63256.8752073638. The cubic root of 4001432261 is about 1587.5904937440.

Adding to 4001432261 its reverse (1622341004), we get a palindrome (5623773265).

The spelling of 4001432261 in words is "four billion, one million, four hundred thirty-two thousand, two hundred sixty-one".